Polyethylene-based resin film

Abstract

A polyethylene-based resin film is provided, wherein the film is formed of a resin composition containing the following component (A), component (B) and component (C): component (A) is an aliphatic polyester; component (B) is an ethylene-α-olefin copolymer having an activation energy of flow (Ea) of from 45 to 100 kJ/mol; and component (C) is a compatibilizer for the component (A) and the component (B). When the total amount of component (A), component (B) and component (C) contained in the resin composition is 100% by weight, the content of component (A) is from 5 to 17% by weight, the content of component (B) is from 75 to 90% by weight, and the content of component (C) is from 3 to 15% by weight:

1 . A polyethylene-based resin film,
 wherein the film is formed of a resin composition comprising the following component (A), component (B) and component (C), and   when the total amount of the component (A), the component (B) and the component (C) contained in the resin composition is 100% by weight, the content of the component (A) is from 5 to 17% by weight, the content of the component (B) is from 75 to 90% by weight, and the content of the component (C) is from 3 to 15% by weight:   Component (A): an aliphatic polyester,   Component (B): an ethylene-α-olefin copolymer having an activation energy of flow (Ea) of from 45 to 100 kJ/mol,   Component (C): a compatibilizer for the component (A) and the component (B).   
     
     
         2 . The film according to  claim 1 , wherein the component (A) is a polylactic acid, a poly-3-hydroxybutylic acid ester, or their mixture. 
     
     
         3 . The film according to  claim 1 , wherein the ethylene-α-olefin copolymer has a density of from 905 to 950 kg/m 3  and a melt flow rate of from 0.1 to 10 g/10 min. 
     
     
         4 . The film according to  claim 1 , wherein the film has a thickness from 5 to 300 μm. 
     
     
         5 . A polyethylene-based resin film having a HAZE of from 20 to 90%, a 1% secant modulus of 225 MPa or more and less than 500 MPa, an impact strength of 10 kJ/m 2  or more, a tear strength in the machine direction of more than 20 kN/m, and a heat seal strength measured when the film has been heat sealed to itself at 160° C. of 8 N or more. 
     
     
         6 . A polyethylene-based resin film having a HAZE of from 20 to 90%, a 1% secant modulus of 225 MPa or more and less than 500 MPa, an impact strength of 10 kJ/m 2  or more, a tear strength of 20 kN/m or less in the machine direction, and a heat seal strength of 8 N or more at which the film has been heat sealed to itself at 160° C. 
     
     
         7 . The film according to  claim 2 , wherein the ethylene-α-olefin copolymer has a density of from 905 to 950 kg/m 3  and a melt flow rate of from 0.1 to 10 g/10 min. 
     
     
         8 . The film according to  claim 2 , wherein the film has a thickness from 5 to 300 μm. 
     
     
         9 . The film according to  claim 3 , wherein the film has a thickness from 5 to 300 μm.